Cobra Roadster Frame & Chassis

Highland Daytona Racing offers its state of the art Gen-3 GT car frame and chassis delivering unparalleled performance value.

If you're thinking this looks like an all-out, race-bred frame, you're right! If you're thinking, or have been told, that the Highland Daytona Racing car is a race-only machine, and/or UN-streetable, NOT SO!

GT Car Reality
What is a GT car, and why are they built this way? From their humble beginnings, GT cars have, and will continue to be, built with the same basic guidelines: mechanical endurance and driver safety, the latter being much better than days gone by. GT cars have traditionally been raced on harsh, open-street circuits where endurance and occupant safety are both the highest priority.

Along with the increasing popularity of this type of racing comes the evolution of material and parts used to progress both endurance and safety. Owning and driving an HDR car, even if only for mild street use, will guarantee you two very important points:

• Several times the safety margin found in any other sport replica
• Several times the reliability due to our use of only the highest end materials

Chassis Specifications

Round Tube

• Seamless 4130N aircraft alloy, chrome-moly round tube with thicknesses ranging from 0.065 to 0.120

Roll cage

• 0.120 wall seamless chrome-moly; 6 points with driver and passenger lower non-removable side door intrusion bars

4130N Aircraft alloy is five (5) times as strong as the replica industry standard of 1010, 1018 or 1020 ERW seamed mild box tube or round tube. 4130N has a strength deflection rating of 85,000 to 125,000 psi.

D.O.M. or (Drawn over mandrel) Seamless tubing is two (2) times as strong as the replica industry standard of 1010, 1018 or 1020 ERW mild seamless tube. Although still mild steel, its manufacturing process of both work hardening and heat hardening raises this products deflection rating a little above 30,000 psi.

ERW or (Electric Welded) tubing in 1018 or 1020, whether it be round, square or rectangular begins as flat stock, pressed into shape with the resulting seam then welded closed. This tubing is not allowed in most race car fabrication which is governed by the race sanctioning bodies. However it is the staple material used in most kit car and turnkey minus replica brands. Mild steel has a deflection rating of 17,000 to 20,000 psi.

The HDR 427 FIA Roadster frame strength is 11,800 ppd = (pounds per degree). Compare that to the kit car & replica industry standard frame: 2,800 to 4,500 ppd = (pounds per degree). HDR's frame is 3 to 4 times as strong!